146 lines
3.9 KiB
Groff
146 lines
3.9 KiB
Groff
.\" Copyright (c) 2003 Ruslan Ermilov
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 1, 2004
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.Dt NG_VLAN 4
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.Os
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.Sh NAME
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.Nm ng_vlan
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.Nd IEEE 802.1Q VLAN tagging netgraph node type
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.Sh SYNOPSIS
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.In sys/types.h
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.In netgraph.h
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.In netgraph/ng_vlan.h
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.Sh DESCRIPTION
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The
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.Nm vlan
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node type multiplexes frames tagged according to
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the IEEE 802.1Q standard between different hooks.
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.Pp
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Each node has two special hooks,
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.Va downstream
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and
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.Va nomatch ,
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and an arbitrary number of
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.Dq vlan
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hooks, each associated with a particular VLAN tag.
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.Pp
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An
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.Dv ETHERTYPE_VLAN
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frame received on the
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.Va downstream
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hook with a tag that the node has been configured to filter
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is sent out the corresponding
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.Dq vlan
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hook.
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If it does not match any of the configured tags, or is not of a type
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.Dv ETHERTYPE_VLAN ,
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it is sent out the
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.Va nomatch
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hook.
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If the
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.Va nomatch
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hook is not connected, the packet is dropped.
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.Pp
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An Ethernet frame received on the
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.Va nomatch
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hook is passed unmodified to the
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.Va downstream
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hook.
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.Pp
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An Ethernet frame received on any of the
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.Dq vlan
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hooks is tagged accordingly and sent out the
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.Va downstream
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hook.
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.Sh HOOKS
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This node type supports the following hooks:
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.Bl -tag -width "Aq Em any valid name"
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.It Va downstream
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Typically this hook would be connected to a
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.Xr ng_ether 4
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node, using the
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.Va lower
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hook.
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.It Va nomatch
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Typically this hook would also be connected to an
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.Xr ng_ether 4
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type node using the
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.Va upper
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hook.
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.It Aq Em "any valid name"
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Any other hook name will be accepted and should later be associated with
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a particular tag.
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Typically this hook would be attached to an
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.Xr ng_eiface 4
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type node using the
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.Va ether
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hook.
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.El
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.Sh CONTROL MESSAGES
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This node type supports the generic control messages, plus the following:
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.Bl -tag -width foo
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.It Dv NGM_VLAN_ADD_FILTER Pq Ic addfilter
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Associates a hook with the tag.
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.It Dv NGM_VLAN_DEL_FILTER Pq Ic delfilter
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Disassociates a hook from the tag.
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.It Dv NGM_VLAN_GET_TABLE Pq Ic gettable
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Returns a table of all hook/tag associations.
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.El
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.Sh EXAMPLES
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.Bd -literal
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#!/bin/sh
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ETHER_IF=rl0
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ngctl -f- <<EOF
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shutdown ${ETHER_IF}:
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mkpeer ${ETHER_IF}: vlan lower downstream
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name ${ETHER_IF}:lower vlan
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connect ${ETHER_IF}: vlan: upper nomatch
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EOF
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ngctl mkpeer vlan: eiface vlan123 ether
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ngctl msg vlan: addfilter '{ vlan=123 hook="vlan123" }'
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.Ed
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.Sh SHUTDOWN
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This node shuts down upon receipt of a
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.Dv NGM_SHUTDOWN
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control message, or when all hooks have been disconnected.
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.Sh SEE ALSO
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.Xr netgraph 4 ,
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.Xr ng_eiface 4 ,
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.Xr ng_ether 4 ,
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.Xr ngctl 8 ,
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.Xr nghook 8
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.Sh HISTORY
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The
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.Nm
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node type appeared in
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.Fx 4.10 .
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.Sh AUTHORS
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.An Ruslan Ermilov Aq ru@FreeBSD.org
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